Solenoid motor



l. B. wlNsoR 1,918,364

SOLENOID MOTOR Filed oct. 6, 1930 2 sheets-sheet 1 July 18, 1933.

l. B. WINSOR SOLENOH) MOTOR July is, 1933.

Filed Oct. 6, 1930 2 Sheets-Sheet 2 iNvENToR MTORNEY m @y HATZW Patented July 18, 1933 PATENT OFFICE IIR-TIN B. WINEOR, GF TULSA, OKLAHOMA SOLENOIE MOTOR Application filed October 6, 1930.

My invention relates to magnetic motors and more particularly to motors of that character especially adapted for pumping oil wells, the principal object of my invention being to provide a. motor having a greater lifting capacity in proportion to its current consumption than similar apparatus heretofore provided. -i Other important objects of the invention are to provide a novel head for the motor for preventing entrance cl liquid, under the high pressure at the bottom of a well, into the windings ot the motor; to embody means for accurately limiting the up-and-down movement oi the plunger' in order to eti ct a proper positioning oit the plunger relative to the coils for obtaining maxim um eliiciency; and to embody shocleabsorbing means Yfor the plunger.

In accomplishingl these and other objects ot my invention l have provided improved detailsof structure the j neferred form ot which is illustrated in the accompanying drawings, wherein:

Fig. 1 is an elevational view of a magnetic motor in functional position in the lower end o1 an oil well shown in central section.

F 2 is a central verticai section ot the upper end oi a magnetic motor embof'lying my invention.

Fig. is a central sectional view ot thc lower end oi the motor.

Fig. 4 is perspective view, partly in soction, ot a core tube, a core mounted therein and a coupling and coil member mounted thereon.

Fig. 5 is a diagrammatical view oi" thc coil windings connected in circuit with current supply and control inechanisin.

Fig. G is a perspective View, partly in section, oi a head for the motor, a door being shown in disassen'ibled relation with the head.

Fig. 7 is a cross section of a coupling member on the line 7 7 Fig. 4i.

Referring more in detail to the dra wings:

1 designates an oil well lined with casing 2 supported by a casing shoe 3 on cap roel( 4l adjacent the lower .end ot the well. Extending into a body of oil 5 collected in a shot hole 6 in the. oil sand 7 below the cap rock,

Serial No. 48,69

is a strainer pipe S connected by a standing valve 9, workin0h barrel 10 andcoupling 11 to the lower end ot' a solenoid motor 12 embodying my invention and now to be described in detail.

rlhe motor preferably comprises lower and unper coil units 13 and 14 connected by a couping l5, a supporting element 16 secured to "le upper end ot the working barrel tube and onnected by a coupling 17 to the. lower end oiE the unit 13, and a head 18 joining the uper coil unit to the string of well tubing 19 ea ing to the top ot the well. It is parici arly necessary that the coupling 15 be ormed o'lL a good grade of bronze or similar metal to magnetically insulate the coil units.

.llach coil unit includes a cylindrical solenoid jacket or barrel 20, the lower jacket being internally threaded at its lower and upper ends as indicated at 21 and 22 for respectively engaging the couplings 17 and 15, and the upper jacket 2O having internally threaded ends 23 and 24 for respectively engaging the coupling 15 and the head 18.

Formed in the acket of the lower unit, adjacent its lower end, is an internal flange 25 conical in cross section to increase the pulling capacity of the motor and delining a cylindrical opening 26 aligning with a complementary guide opening 27 in a similar iiange 28 provided adjacent the upper end of the coil unit 14.

The couplings 15 and 17, each comprising mating sections 29 and 30, are provided in like manner with aligning openings 31 and 32, so that a continuous core tube 33, preterably constructed of brass or other non-magnetic material and joined in the coupling 15, may be extended throughout the solenoid jackets.

The outer surface of the core tube is reduced in diameter to form pairs of annular bosses 34 and 35 equally spaced on the tube and threaded for receiving' lower and upper coil heads 3G and 37, thereby producing spools for the coil windings of the motor.

As shown in Fig. 2, the upper heads of the two lower spools in the coil unit 14 are chamfered to increase the magnetic pull of the solenoids, and the lower heads of the two upper spools in unit i3 are likewise chainfered as shown in Fig. 3.

Each of the coil heads and also the flange 28 in the upper coil unit are provided with dialnetric-allyi opposed ports and slot-s 38 to serve as passages for wire strands connecting the windings 39 on the spools.

The rnanner'of winding the spools particularly illustrated in Fig. 5 troni which it will be readily apparent lthat the ot upper and lower coils are each wound in series. In winding the coils on the spools a plurality ot' layers of insulating paper with a layer of insulating cloth between successive layers of paper are preferably wound on the core tube between the coil heads. Successive layers ofinagnet wire are then wound over the insulation andeach layer of wire treated with'a good grade ot varnish. After the coils have Vbeen wound and surrounded with additional insulating cloth the unit is baked to Vprevent'"l'noisture from penetrating the windings. Y i `Slidably mounted within the core tube is a continuous core or plunger #l0 formed ol alternatesteel and bronze sections ll and 42, the bronze sections having reduced, externalthreaded necks l?) on each end tor engaging the internally threaded sockets ld forined in the ends of the steel sections. Attention is further directed to the 'fact that one end oit thelsteel section is chanitered, as indicated at 45, for thepurpose ot increasing the inagnetic pull of the inotor.

Thel upper end ot the plunger is connected by a'couv ling '1- G to the lower end of a hollow rod/17 endingV to a point above the upper endet the puinp head 1S.

The uinp head preferably comprises a Acyliiidrical body 4.8 having an externally threaded Ylower neck 49 for engaging the nplper end of the punipy jacket, and is Yfurther rovided with opposite openings 5.() and 5l. normally closed by doors 52 secured to the ,cylindrical body by screws or the like 53. l'concentric shield 54 tornicd integrally with the head extends downwardly therein tio direct vlow of liquid troni the well through orts ldforined in the lhead innnediatcly above theshiold to perniit escape of liouid bypassing the plunger and collecting ini-flic upper end of the core tube. An outer skirt fi'provided on the head above said port serves to prevent foreign particles trein lodging in said openings to obstruct 'flow of duid therethrough.

' lrovlide'd on `one side oit the head is a .lougitudinal boss 57 having an opening 5S for receiving wires 59 leading troni a source of lelectrical energy, as later described, and

tending downwardly through the head for connection with the wires of the solenoids when the doors of the hc ad have been reinove l. The inner channel ot' the head is constrictrd by an inwardly extending liange 60, thus lforming a socket 6l adapted to seat packing material (i2 for engaging the hollow rod 1:7 to prevent escape ot l'luid around the rod.

Means for urging the packing material downwzndly in the socket includes a sealing collar 63 engaged on its upper end by a gland. (S-/l threaded into the upper end oli the head and having a reduced portion (i5 ior the appli ation oi a suitable tool used for threading the gland into or out of tlie head.

The tubing l), as is connnonly clnploycd n pumping oil wells is thrcafled, as indifatcd at (7, on the externally threaded upper end ot the head, and removal. olE the inotor iti-oni a well is facilitated through the provision of a series oi'f circuniiercntial teeth (iS torined on the head near its upper end.

lllhcn the coils oi' thc inolor are not encr- QiI-Gcd ihe plun( rests on the supporting clc- -`t 1G which includes cylindrical housing niving a reduced exitcrnaliv threaded neck {if} ilor eng the interna :y threaded end oil the coupling scciion 25), and having a lower eonstricted opening lll for receiving the workmounted in a concentric socket 7l., the supporter housing, are opposed guides 72 :inl 'Til for receiving a plunger tube -ll connected ai. its lower cud to 'the pump plunger andV at .its upper end to the core L'l-(l. and an expansion spring T5, seated in the socket, hears against outwardly directed i'flzxngcs 'iti ot the guides to normally space the inner ends ot the guildes. lransvcrsc ports 77 provided in i'he supporter housing serve to pcrinill discharge oiE licl iid bypassing the piungcr and collecting in thc socket 7l.

Vi'hile the clement lli sisi ports the plunger when the punip is not in operation, it is not intended plunger when the coils are energized. as poun(.liirg ot the plunger on thc supporter would lie dctrinici al 'to ille puinp.

The liinit ot rixfiprocating movement of i' ic inagrnetic core or i'ilunger y-l-(l,

ation, determined by the lengt-h of the ccntral section dividing the plunger into upper d lower portions. lit is possible only by enperiinentation to accurately ascertain the proper lengt/fili ol" this section ncc -\.ssarv to produce tl e desircil cusllimiing ellecl at leach cud olfA the plunger stroke and to properly position the core relative 'to the coils for uraninuun eliieiency ot the inotor.

p iaratus ior supplying electrical energy and controlling liow thereof to the solenoid windings preferably includes a circuit breaker 78 of the reciprocating type, a gcnerator 79 and a rheostat 80. A. wire 8l leading 'roin the gr-n'icrator connects to a movable arin S2 of the rheostat and another lead 83 troni the generator is grounded on the core tube and provided with a switch S4. The rheostat in turn is respectively connected by lo liinit the downward travel ot lhc l ism branches and 86 Ito the lower and upper groups of coils, which are each preferably connected in series, and the branches are provided with switches 87 and 88 respectively, adapted to be alternately opened and closed by a reciprocable armature 89 of the circuit breaker.

In apparatus constructed and assembled as described the plunger will normally rest at its lower limit of travel as shown in Figs. 2 and 3. lVhen in this position the switch Slmay be closed and upon closure of the switch 87 current is supplied from the generator to the lower group of solenoid windings.

As is clearly disclosed in Fig. 5 the upper ends of the iron sections in the unit 13 are positioned slightly below the center of the windings when in lowered position, and upon energization of the coils the plunger is immediately drawn upwardly into the unit until the lower ends of the iron sections in the upper unit reach a point slightly above the center of the upper solenoids.

Through action of the circuit breaker the current to the lower series of coils is broken and the circuit to the upper series of coils is closed thereby drawing the plunger downwardly to its former position.

Gil is thus pumped through the usual standing and working valves and is drawn upwardly through the hollow plunger and into the tubing to be discharged from the well and led to storage as in usual practice. ln passing through the hollow core or plunger the fluid carries away the excessive heat generated by the coils, thereby maintaining a temperature of the coils equal to that of the fluid in the well.

As a result of the method of spacing the respective series of core sections relative to their complementary series of solenoids a magnetic cushioning effect is produced at each end of the stroke of the core plunger, thus insuring smooth and eliicient operation of the motor.

Vilhat l claim and desire to secure by Letters Patent is:

l. A motor of the character described including a housing, a core tube extending coneentrically through said housing, an electric circuit including coil units wound in spaced relation on said tube and current-supply lines leadin to said units, a core unit reciprocable in said tube and responsive to energization of the eoil units, and a head on said housing having transverse openings and removable vplates adapted for closing said openings to permit connection of the supply lines with the coil wlndings.

Q. A motor of the character described including a housing, a core tube extending longitudinally through said housing, coil units wound in spaced relation on said tube, a core unit reciprocable in said tube and responsive to energization of the coil units, a head on said housing having transverse openings and removable plates adapted to close said openings, and a concentric shield extending downwardly in said head and spaced from said openings.

3. A motor of the character described including a housing, a core tube extending concentricaily through said housing, pairs of coil heads iixed on said tube to form spools, coils wound on said spools, one head oi? each pair being chainfered to increase the magnetic pull of the coils, and a core unit comprising magnetically insulated sections slidably mounted in said tube and adapted to be reciprocated upon energization of said coils.

4, A. motor of the character described including a housing, a core tube extending longitudinally through said housing, coil units wound in spaced relation on said tube, a core unit reciprocable in said tube and responsive to energization ot the coil units, and a head on said housing having a relief port to permit escape oi' liquid collecting within the core tube above the core unit upon upward nmvement of the core unit.

A motor ot the character described inclui'ling a housing, a core tube extending longitudinally through said housing, coil/units wound in spaced relation on said tube, a core unit reciprocable in said tube and responsive to energization oi2 the coil units, a head on said housing having relief ports to permit escape of liquid collecting within the core tube above the core unit upon upward movement o'lI the core unit, and a supporting element on the lower end of the housing having relief ports to permit escape of liquid collecting in said element.

6. A motor of the character described for pumping well iiuid through well tubing including a housing land sets of axially aligning solenoids in the housing, a hollow core unit through which said lluid is adapted to be pun'iped comprising separate insulated sections adapted to be reciprocated upon energization of said solenoids, a plunger tube connected to the lower end of the unit and communicating with said hollow core, a head connesting the upper end of the housing` to the weil tubing, and packing means seated in said head and sealingly engaging the upper end of 'the core unit. i

IRWIN B. VINSOR. 

